State · United States · USGS · BOR · USACE · CDEC
Arizona
63.5% average fill
Measured
10
Volume stored
4,231 hm³
Measured capacity
6,660 hm³
Critical
1
Low level
1
Below month average
4 of 10
Is your city close to water restrictions? See the US tracker
Loading map…
Drought Monitor · 20 October 2026
Weekly map · area in each categoryDrought status
41.1%
of the area in drought (D1 or worse)
Worst category: D2 severe drought
down 5.3 points on the week
Severe or worse (D2+)
11.7%
Extreme or worse (D3+)
0.0%
DSCI
1290–500
People in drought
3.9 million
Reservoirs (reservoirs.earth)
63.5% full10 tracked
Reservoirs on drought ground
2 of 10
As of the 20 October 2026 U.S. Drought Monitor map, 41.1% of Arizona was in drought (D1 or worse). The 10 reservoirs we track in Arizona were 63.5% full on their latest readings. 2 of 10 tracked reservoir sites sit inside the drought area.
The Drought Monitor maps where conditions are dry this week — rainfall, soil moisture, streamflow — not how much water is stored. Reservoir storage lags it by months, so a region can be in drought with full reservoirs, or out of drought with empty ones. Source: droughtmonitor.unl.edu. The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Reservoirs
Sorted by capacityRoosevelt Lake
Updated 2026-10-28· 66% of month avg
Lake Mohave
Updated 2026-10-26· 105% of month avg· D1
San Carlos Reservoir
criticalUpdated 2026-10-27· 36% of month avg· D0
Lake Havasu
Updated 2026-10-26· 93% of month avg· D1
Apache Lake
Updated 2026-10-28· 101% of month avg· D0
Bartlett Reservoir
Updated 2026-10-27· 140% of month avg
Horseshoe Reservoir
Updated 2026-10-27· 131% of month avg
Saguaro Lake
Updated 2026-10-28· 102% of month avg· D0
Canyon Lake
lowUpdated 2026-10-28· 36% of month avg· D0
C.C. Cragin Reservoir
Updated 2026-10-27· 198% of month avg
Storage from official US gauges (USGS, USACE, Bureau of Reclamation, CDEC) and, in Texas, the Texas Water Development Board. Fill % uses design capacity from the National Inventory of Dams where available; Water Data for Texas lakes use that board's conservation capacity; a few sites without a match fall back to the 5-year maximum. "% of month avg" compares the current fill with the reservoir’s own average for this calendar month over its readings on record. D0–D4 is the U.S. Drought Monitor category of the ground at the reservoir’s coordinates on the latest weekly map — local conditions, not storage.
About reservoirs in Arizona
As of October 28, 2026, the reservoirs we track across Arizona that report live levels hold roughly 4,231 hm³ of water — about 63.5% of their combined capacity. Taken together, Arizona's reservoirs are within their normal operating range.
Across the region, 1 reservoir is at critically low levels and 1 is low. Lake Mohave is the fullest at 102.8%, while San Carlos Reservoir is the lowest at 6.0%.
Over the most recent week on record, 4 reservoirs rose and 1 reservoir fell across Arizona.
Storage figures for Arizona come from USGS · USACE · BOR · CDEC; the most recent reading is from October 28, 2026. Each reservoir below links to its own page with full history and seasonal context.
Arizona at a glance
- Reservoirs tracked
- 10
- Average fill
- 63.5%
- Water stored
- 4,231 hm³
- Combined capacity
- 6,660 hm³
- At critically low levels
- 1
- Fullest
- Lake Mohave (102.8%)
- Lowest
- San Carlos Reservoir (6.0%)
- Last updated
- October 28, 2026